BSP for 405EX

[Till Straumann]

Thomas Doerfler wrote:
> Nigel,
>
> the 405 core is supported.
>
> Don't be confused: quite recently we dropped support for a"gen405" BSP, 
> because it was still stuck to the "old exception model". Background: For 
> some years, there were two methods to hook exception handlers and 
> interrupt handlers to a PowerPC-based system. gen405 was one of the last 
> BSPs that used the "old exception handling" scheme and was dropped some 
> weeks ago.
>
> But: the "virtex" BSP is also based on a 405 CPU, and it works with the 
> "new exception processing", so this BSP will be a better base for your work.
>   
I'd like to add my 2 cents here; recently a framework for supporting 
exceptions
and interrupts has been added under

libcpu/powerpc/new-exceptions/bspsupport

please consider using that framework rather than deriving your own variants
from

  libbsp/powerpc/shared/irq/irq_asm.S
  libbsp/powerpc/shared/vectors/vectors.S
  libbsp/powerpc/virtex/irq_init.c
  etc.

Cheers
-- T.
> The next step for you should really be to build a set of drivers, 
> possibly in "c/src/lib/libcpu/powerpc/ppc405" and a BSP in 
> "c/src/lib/libbsp/powerpc/haleakala" (or which name might ever be 
> applicable).
>
> wkr,
> Thomas.
>
>
> Nigel Spon schrieb:
>   
>> I have been experimenting with RTEMS 4.8 on my Mac under OSX, and  
>> things seem to be working. I have managed to build a powerpc-gdb and  
>> connect to my target board via a PC running the Macraigor remote gdb  
>> tool, so it looks as though I can actually develop and debug with this  
>> configuration, which is pretty encouraging (and a bit of a surprise,  
>> to be honest).
>>
>> The target board is an AMCC Haleakala eval board and has a PPC405EXr  
>> processor, for which no BSP exists. I presume my next step is going to  
>> be to build a BSP, but the documentation seems to indicate that if the  
>> processor isn't supported I have to take other steps first. I'm not  
>> sure if the processor is supported; the 405 appears to be, is that all  
>> I need? I'm also wondering what to base my BSP on, and if I should  
>> stay with 4.8 or go to 4.9? The PPC405EX has quite a few onboard  
>> facilities (Ethernet, timers, UARTs) that I presume could go into a  
>> fairly generic BSP for the 405EX. Is this the right way to proceed?
>>
>>
>> --
>> "The command could not be completed because it cannot be moved into  
>> itself"
>>
>> Michael Hamel
>>
>>
>>
>>
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>
>
>